package exception;
/**
 java异常处理机制:try...catch
 */
public class TryCatchDemo {
    public static void main(String[] args) {
        System.out.println("程序开始了...");
        try{
            String line=null;
            System.out.println(line.length());
            String line1="";
            System.out.println(line1.charAt(0));
            String line2="abc";
            System.out.println(Integer.parseInt(line2));
        }catch (NullPointerException | StringIndexOutOfBoundsException e){
            System.out.println("出现了空指针或字符串下标越界异常并解决了");
        }catch (Exception e){
            System.out.println("出了个错误并解决了");
        }
        /*
        catch (NullPointerException e){
            System.out.println("出现了空指针异常并解决了");
        }catch (StringIndexOutOfBoundsException e){
            System.out.println("出现字符串下标越界异常并解决了");
        }

         */
        System.out.println("程序结束了...");
    }
}
